QUESTION 3 What was not used to determine the order of the [Dye] in the rate law

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QUESTION 3 What was not used to determine the order of the [Dye] in the rate law? The table of data that shows the changes of rate as a consequence of the change in the [Dye] for all experiments. O The association of the appropriate integrated rate law with the linear function exhibited by the plotted data. - The mêthod of isolation 0 The plot of Ln [Dye] versus time. QUESTION 4 What is the initial c oncentration of Bleach if you used %5 in a Run where 2 mL's are used with 25 mL's of Dye? 0.053 M e 0 072 M 0.72 M 9.72 M ® None of the above to save all answers Clhiek Save and Submit to save and submit. Click Save ALA

Explanation / Answer

Question 4 :

  The chemical formula for bleach (sodium hypochlorite) is NaOCl.

NaOCl has a molecular weight of 74.44 g/mol.

The solution has a density of 1.08 g/mL, and that is the only information we're given.

Without additional information, you cannot calculate the molarity of the solution.

A density of 1.08 g/ml can be converted to 1080 g/L.

However, since we can easily find that most commercial bleach is actually 5 % sodium hypochlorite, we have a route to the answer.

  Assume we have 1 liter of this solution. It has a mass of 1080g, since its density is 1.08g/mL. Of that mass, what part is sodium hypochlorite?

5 % x 1080

= 0.05 x 1080 = 54 g NaOCl per liter of solution

How many moles is that? (Remember, we want moles per liter to get molarity.)

54 g / 74.4 g/mol = 0.72 moles NaOCl

Molarity = moles / liters

= 0.72 / 1

= 0.72 M

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